<template>
  <el-container class="home-container">
    <!--头部区域-->
    <el-header>
      <div class="header-font-div">
         <img width="40px" height="40px"  src="../assets/1.jpg">
         <span class="header-font">电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区域-->
    <el-container>
      <!--左侧侧边栏-->
      <el-aside :width="isCollapse ? '64px' : '200px' ">
        <div class="toggle-button" @click="toggleCollapse()">|||</div>
        <!-- 侧边栏菜单区域-->
        <el-col :span="12">
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#4593F5" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true"
            :default-active="activePath">
            <!--一级菜单-->
            <el-submenu :index="'/'+item.path" v-for="item in menuList" :key="item.id">
              <!--一级菜单的模板-->
              <template slot="title">
                <i :class="iconsObj[item.id]"></i>
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item @click="saveNavState('/'+subItem.path)"     :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id">
                <template slot="title">
                  <i class="el-icon-menu"></i>
                  <span>{{subItem.authName}}</span>
                </template></el-menu-item>
            </el-submenu>
          </el-menu>
        </el-col>
      </el-aside>
      <!--右侧内容-->
      <el-main>
         <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        125: 'el-icon-s-custom',
        103: 'el-icon-s-tools',
        101: 'el-icon-s-goods',
        102: 'el-icon-s-order',
        145: 'el-icon-s-marketing'
      },
      // 是否折叠
      isCollapse: false,
      // 当前激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    // 退出功能 原理清除token
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取左侧菜单栏
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击进行菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped>
    .home-container{
      height: 100%;
    }
    .el-header{
       padding-left: 0;
       background-color: #373D41;
       display: flex;
       justify-content: space-between;
       color: white;
       font-size: 20px;
    }
    .header-font-div{
      display: flex;
      align-items: center;
    }
    .header-font{
      margin-left: 15px;
    }
    .el-aside{
       background-color: #333744;
    }
    .el-menu{
      border-right: none;
    }
    .el-main{
       background-color: #eaedf1;
    }
    .iconfont{
        margin-right: 10px;
    }
    .toggle-button{
        background-color: #4A5064;
        font-size: 10px;
        line-height: 24px;
        color: white;
        text-align: center;
        letter-spacing: 0.2em;
        cursor:pointer;
    }
</style>
